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Old 22.04.2014, 20:31
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Grout cleaning - magic tricks?

Is there some magic potion that cleans grout on floor tiles? On our kitchen I've tried bleach, acetone, ammonia and various other proprietary liquids and nothing even touches the colour.. I know it's not meant to be black cos there are little upright tiles where the grout is light grey, not black!

So aside from mechanical force or paint, any stuff that will clean it?
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Old 22.04.2014, 21:05
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Re: Grout cleaning - magic tricks?

I haven't ever tried doing this myself, but this website offers a few suggestions, including mixing chlorine bleach with baking soda:

http://www.wikihow.com/Clean-Grout-Between-Floor-Tiles

I know that in home improvements stores here, like OBI and Coop Bau & Hobby, there are spray bottles of products (in their cleaning products section) that are specifically targeted for certain types of problems (e.g. one for mold on balcony floors, one for urine stains, etc.). Perhaps they have one that is targeted for grout.

Otherwise, I would go to an OBI store and ask someone at their info. desk.

Good luck!
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Old 22.04.2014, 21:41
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Re: Grout cleaning - magic tricks?

Have you tried Cillit Bang with Javel (bleach)?? Its the purple and white spray. I use it to clean the grout at our house and it does the trick. Just ensure to follow the instructions on the pack and do not leave it on for more than 5 mins. I usually gently spray it along the grout, leave it for about a minute and use an old toothbrush to scrub off the dirt. It works!
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Old 22.04.2014, 21:42
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Re: Grout cleaning - magic tricks?

Steam cleaner works well

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Old 22.04.2014, 21:43
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Re: Grout cleaning - magic tricks?

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Is there some magic potion that cleans grout on floor tiles? On our kitchen I've tried bleach, acetone, ammonia and various other proprietary liquids and nothing even touches the colour.. I know it's not meant to be black cos there are little upright tiles where the grout is light grey, not black!

So aside from mechanical force or paint, any stuff that will clean it?
Looking at the magnified picture, it appears that the surface of the grout is a bit uneven and that gives the impression that it "dirty". It also looks to me that the grout was not cleaned away properly in places from the edges of the tiles when these were laid.
I did lay some quarry tiles once in my own kitchen and was told to use sawdust for cleaning the wet grout off the surface of the tiles. If, however, the sawdust mixed with the grout in the gaps between the tiles then grout could not have a nice smooth surface. Something similar could be the problem here.
I was told another trick when laying a quarry tile floor was afterwards to wipe the floor over with linseed oil to give it all an even gloss. I'm not totally convinced about this myself and, anyway, your tiles appear to be quite fine whereas quarry tiles are "rustic" although the oil might just make the grout colour more even and hence look "cleaner".
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Old 22.04.2014, 21:46
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Re: Grout cleaning - magic tricks?

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Steam cleaner works well

Steam cleaning gets my vote, too.

(high pressure wash, probably too messy for indoors?)
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Old 22.04.2014, 21:53
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Re: Grout cleaning - magic tricks?

Years ago it was fashionable to colour the grout, and make the tiles stand out better. Is it possible they used dark grout on the floor tiles and light grout on the wall tiles?

Take an old knife and try and take some grout away, and see if it is black grout, or dirt.
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Old 22.04.2014, 22:09
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Re: Grout cleaning - magic tricks?

And if after all that, it does turn out to be just plain dirt, then you could also try an old fashioned solution with hot water and detergent yourself . . . or even get one of these . . .
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Old 23.04.2014, 02:49
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Re: Grout cleaning - magic tricks?

There is a product sold at Bahaus, I will check it tomorrow. It's professional but it really works wonders.
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Old 23.04.2014, 07:52
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Re: Grout cleaning - magic tricks?

It looks too even to me to be dirt. Its quite common that they use dark grout om the floor tiles here. Probably because they generally gets more dirty than the wall toles.
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Old 23.04.2014, 10:14
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Re: Grout cleaning - magic tricks?

We have the same problem in our kitchen but I use the cilit bang with the orange top that is supposed to be for bathroom use. Leave it to soak for a few minutes then I use a dish scrubbing brush.
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Old 23.04.2014, 10:17
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Re: Grout cleaning - magic tricks?

Durgol, comes in liquid or spray form, spray is easier for shower cleaning.

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Old 23.04.2014, 10:29
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Re: Grout cleaning - magic tricks?

Thanks for the ideas peoples.

I'm pretty sure it's dirt, when I mention the upright tiles, it's not quite wall tiles but same tiles as the floor which have been cut and laid like a sort of skirting board all around the kitchen.

It's a high traffic area and takes a lot of punishment but that said, the colour is pretty uniform across the whole floor, not just by the cooker. So who knows, it could be intentional colour.

I'll try scratching some off tonight and see what's below the surface. It's just annoying me now, raw bleach and scouring pad did nothing!
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Old 23.04.2014, 10:35
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Re: Grout cleaning - magic tricks?

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It looks too even to me to be dirt. Its quite common that they use dark grout om the floor tiles here. Probably because they generally gets more dirty than the wall toles.
I'm inclined to agree with this especially as the OP has indicated that it is uniform across the whole floor. It's not uncommon to use a much darker grout in areas of heavy use such as the kitchen. It was like it in the kitchen of the house we rented here.
I would also have expected neat bleach and a scrubbing brush to have had some effect if it was really just dirty.
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Old 23.04.2014, 10:36
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Re: Grout cleaning - magic tricks?

The grout is probably porous and has allowed dirt to become ingrained so it's unlikely that it's going to be spotless again. We have the same problem in in our bathroom but as it's basically clean, i.e. vacuumed and wiped down regularly, I'm happy to leave it be.

The alternative would be to scrape it all out and re-grout it, which is a pig of a job but if you really can't live with the staining, that's probably your only solution.

Or buy a rug.
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Old 23.04.2014, 11:37
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Re: Grout cleaning - magic tricks?

If it's uniform across the floor and bleach hasn't had any impact at all, then it's almost certainly coloured grout. Sorry.
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Old 23.04.2014, 11:50
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Re: Grout cleaning - magic tricks?

The wall tiles you are referring to (the sockel) may have a different colour grout altogether. A sockel requires a different adhesive and is done after the floor tiles are set. It is possible they changed the grout colour.

Do you have flooring under your cabinets anywhere? If you could get a peek at a part of the floor that has never been walked on you might see the original colour. The only cabinet with a gap at the back is where the plumbing is. If the floor is tiled right to the wall you might see the tiles. Otherwise take a flashlight and small mirror and try to see the tiles this way.

What does the grout in the corners of the rooms look like? If it is as dark as everywhere else, then I think this is the original colour.
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Old 23.04.2014, 12:08
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Re: Grout cleaning - magic tricks?

In the meantime I don't suggest you scraping up your grout.
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Old 23.04.2014, 13:05
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Re: Grout cleaning - magic tricks?

Hi OP, I had a similar situation once, but it was outdoors and I found that a good Pressure cleaning cleared out the dark color and brought the grout (and tiles) back to original color.

It took hours though
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Old 28.10.2014, 16:38
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Re: Grout cleaning - magic tricks?

I have exactly the same problem. I tryed steam cleaning, chemicals, bleach, baking soda, the works, no success. Then I took a screwdriver and scraped out a section.. it was black all the way down.. dirt, oil, and grunge had seeped into it (grout in low traffic areas are grey). So my solution is to piece-meal scrape out the really soiled grout and replace with new grout, tile by tile. I will only do a few regions that are really bad, mainly in the entryway and kitchen.

Isn't there something like non-porous grout that resists staining?
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